Zalibekov Z.G., Mamaev S.A., Biarslanov A.B., Asgerova D.B., Magomedov R.A. POTENTIAL OF SOIL COVER BIOPRODUCTIVE RESOURCES: USE AND RENEWABLE SOURCES // Arid ecosystems. 2021. V. 27. № 1 (86). P. 15-23. | PDF
Soil resources are identified by regional factors of soil genetic differences. This approach is a multifunctional basis for soil resources accounting on a global, regional and local scale. Regional factors include the areas of functioning soils and their detailing characteristics: the contours’ dimensions, space measure, their quantity, principles of crossing lines and the turnover frequency. The purpose of this work is to identify the potential of bioproductive processes, where inherent potential of soil areas is marked by an unlimited increase in productivity within the existing soil dimensions and geometric outlines. The main difference is an increase of phytomass and photosynthetic activity of plants on a naturally limited area of soils from using the inexhaustible resources of the sun cosmic energy and the physical and geographical environmental processes. Combinations generated by soil properties and their usage lead to formation of renewable sources categories, compensating for the scarcity of new areas allocated for development.
Safronova I.N., Kalmykova O. G., Stepanova N. Yu. TRANSVOLGA-TRANSURAL STEPPES OF THE NORTHERN SUBZONE OF THE STEPPE ZONE: SPECIFIC FEATURES OF THE MODERN FORMATION DIVERSITY // Arid ecosystems. 2020. V. 26. № 4 (85). P. 4-9. | PDF
The significant part of the native Transvolga-Transural steppes of the northern subzone of the Steppe zone is destroyed by plowing. And on large territory they are represented by fallow lands of different age. It is known that communities of many formations are spread throughout the steppe zone. The differences in the structure of undisturbed communities in different subzones are quite clear. On fallow lands and pastures these differences are poorly visible. Basing on many years of our research of the vegetation cover in the steppe zone we aimed in 2018–2019 to find out how much the diversity of formations on the fallow lands changes and how their structure can be used to appreciate the subzonal status of the territory. The research is based on field studies including a route method, more than 100 geobotanical descriptions made by standard method, the analysis of which uses ecological-phytocoenotic classification; more than 700 herbarium sheets were collected. We revealed that zonal Stipa zallesskii steppes do not currently dominate in the Transvolga-Transural part of the Northern subzone, but Stipa capillata steppes are dominant representing the background vegetation on the fallow lands. Along with Stipa capillata steppes large areas are occupied by secondary Stipa lessingiana steppes. As peculiar component of the vegetation cover of the Northern subzone we can mention the communities of dwarf semishrubs. They are confined to saline soils or to the outputs of the rocks. Halophytic and petrophytic variants of steppes are represented not only by semi-shrub communities, but also by perennial grasses.
Singh A., Samant S.S. POPULATION AND COMMUNITY STRUCTURE PATTERN OF JUNIPEROUSPOLYCARPOS K. KOCH WITH CLIMATE CHANGE EFFECT IN THE COLD DESERT TRANS HIMALAYAN REGION, INDIA // Arid ecosystems. 2020. V. 26. № 1 (82). P. 21-32 . | PDF
Juniperus polycarpos L. is one of the most threatened and livelihood plant species of the Himalayan region. The present study provides information about monitoring of its populations and proliferation rate in high altitude regions of Trans Himalaya. The survey revealed comprehensive information on J. polycarpos such as distribution range, habitat characteristics, composition, structural pattern, population size, uses and diversity status. Its distribution and density were maximal in pure forest habitats as compared to mixed habitats recorded. Middle forest altitudinal zone (3100-3500 m for dominant J. polycarpos community and 2710-3100 m for mixed communities) showed suitability for its growth and high density. The occurrence of species above treeline altitudinal zone (4100 m) indicates effect by climate change. A total 281 species (158 genera, 48 families, 37.04% native, 2.06% endemic, 23.87% near-endemic, 74.44% economically important and 20.28% threatened species) were recorded within its populations. Frequent monitoring of populations under climate change scenarios is suggested.